Coupling lock



Feb. 12, 1929.

O. PONTO 'COUPLING LOCK M a u Filed March 18, 1926 I/YVEI/TOR. 07' 7'0 Pali TO.

/ Tom Ex Patemted Feb. 12, 1929.

NTE STATS marisa o'r'ro romo, OF LONG BEACH, eimromm.

oourrrrm LOCK.

Application filed March 18, 1926.

In the pumping of deep wells the sucker rods whip about due to their great length, which causes unthreading of the joints and parting of the line. The same is true of tubing; rotary drill pipe and the like, and

standard drilling' strings;

An object of my invention is to provide a lock whereby the sections ot' sucker rods, tubing, pipe and the like can not unscrew.

Another object is to provide a lock which may be readily removed when desired.

Further objects are to provide a lock which is simple in Construction, inexpensive to manufacture and effective in operation.

Other objects, advantages and features of invention may appear from the accompanying drawing, the subjoined detailed description and the appended claims.

In the drawing illustrating my invention.

Fig. 1 is a fragmentary side elevation of a sucker rod jointwith `the locking sleeve shown in section thereon.

Fig. 2 is a partial sectional vie-w taken on line 2-2 Fig. l.

lfg. 3 is a fraginentary sectional View of a modified form otlocking pin.

l is a sectional view taken on line lr- Fig. l.

Fig. 5 is a plan view of the coupling bo::.

6 is a plan view of the looking sleeve.

Fig. 7 is a disassembled View of a modified form of a sucker rod pin and coupling box.

Referring more particularly to the drawingthe sucker rods l, 2 are provided with coupling enlargements 3, 4:-on the adjacent ends thereof. Threaded pins 5, 6 extend froni the enlargenients 3, 4 respectively, and screw into a box 7.

The enlargenents 3, 4: are each provided with fiat faces 8, 8 and 9, 9 respectively, and the box 7 is formed with fiat faces 10, 10. The faces 8, 9, 10' ere in alinement when the pine 5, 6 are screwed into the box 7.

A coupling sleeve 11 fits over the enlargenents 3, l and box 7 and is provided with longitudinally extending fiat faces 12, 12

Serial No. 95,620.

which fit againstthe alined faces 8, 9, 10 thus preventing relative rotetion and unscrewing of the sucker rods and box.

The rod 2 is provided with e seat l on which the sleeve ll rests, which seat pre- Vents the downward movement of said sieeve. To prevent upward movement of the sleeve a looking` pin 14 is provided. This pin may be a set screw, as shown in Figs. l and 2; extending through the rod l and threaded therein, or a yieldable pin 14 may be provided as shown in Fig. 3. By removing the pin M and sleeve li the joint may be uncoupled.

In .Fig. 7, I have shown a slightly modified orm oi' threacled joint. The lower part 15 of the pin 16 is not threaded and acts as a guide to insert the pin into the boi; 17. Alined holes 18, 19 are provided in the box 1. and pin 16 respectively through which holes a looking pin is adepted to extend.

Having' described my invention claim:

l. A tool joint coinprising e pair of meinbers, thr aded pine entending froni said members, a box into which seid pins are threaded, a sleeve surrounding said box, one of said members having; a shoulder on which one end of said sleeve rests, and a yieldable looking pin projecting froni the other niember and engagin the other end of said sleeve.

2. A tool joint comprising a pair of niembers, threaded pins extending froni said members, a box into which said pins are threaded, alned fiat faces on said members and box, a sleeve surrounding said box, said sleeve being 'orncd with flat faces on the iuner surface thereof adapted to engage said first named-flat faces, a shoulder on one of said members against which seid sleeve is adapted to rest, and spring actuated pin extending from the other meniher adanted to bear againstthe opposite end of the sleeve to prevent end-wise movement thereoi'.

In testiinony whereof I efiix my signature.

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